%-------------------------------------------------------------------
% Abstract IEEE NSS 2001
%
% Contact: Hubert Kroha
%          Max-Planck-Institut fuer Physik
%          Foehringer Ring 6
%          D-80805 Muenchen
%          Tel.: +49 (89) 32354-435
%          Fax:  +49 (89) 32354-305
%          Email: kroha@mppmu.mpg.de
% ---------------------------------------------------------------------

The Large-Scale Production and Test of the Precision Drift Tube Chambers
for the ATLAS Muon Spectrometer

F.Bauer, W.Blum, S.Horvat, H.Kroha, A.Manz, R.Richter

Max-Planck-Institut fuer Physik, Foehringer Ring 6, D-80805 Munich, Germany

O.Kortner, F.Rauscher, D.Schaile, A.Staude, R.Stroehmer, T.Trefzger

Ludwig-Maximilians University, Schellingstrasse 4, D-80799 Munich, Germany

G.A. Chelkov, D.V. Dedovitch, P.G. Evtoukhovitch, A.L. Gongadze, M.I. Gostkin,
D.V. Khartchenko, I.N. Potrap, E.V. Rogalev, E.G. Tskhadadze and V.V. Zhuravlov

Joint Institute for Nuclear Research, Dubna, 141980 Moscow Region, Russia


The muon spectrometer of the ATLAS detector at the Large Hadron
Collider (LHC) will contain 1200 high-precision drift chambers 
with a position resolution of 40 micrometer covering an 
active area of 5500 m^2. The chambers consist of 3--4 layers of
pressurized drift tubes on either side of a space frame carrying 
an optical monitoring system to measure deformations (Monitored 
Drift Tube chambers, MDT). We report about the serial production 
of the largest MDT chambers with 432 drift tubes and a width of 
2.16 m. The positioning accuracy of the signal wires in several
of these chambers has been measured with an X-ray scanning device 
at CERN to be better than the required 20 micrometer (rms). Each 
chamber is tested with cosmic rays in a tower consisting of
three MDT chambers. In addition, tests with final
readout electronics are performed in a muon beam at CERN.